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!!!!!!!!!!Phylum Echinodermata: Class Echinoidea
inverts final
7
Biology
Undergraduate 3
12/20/2009
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Term
type
 Definition
sea urchins, sand dollars, sea biscuits
Term
arms
 Definition
lack arms
Term
tube feet
 Definition
project through holes in test in ambulacral (5) region
Term
ossicles
 Definition
fused in a test
Term
regular echinoids
 Definition
spherical, sea urchins
Term
irregular echinoids
 Definition
mushes urchins, secondarily flattened, sand dollar, sea biscuit
Term
aristotles lantern
 Definition
in regular echinoids; help feed, protrude and scrape at algae; ossicles
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